# Relationship history for MSHA mine 1516624

Current hierarchy: **Noah B  Lambert → Nbl Coal Company Inc → No 2 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Derek  Potter et al → No 2 Mine; 1988-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Preece Kelly → No 2 Mine; 1989-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theodore  Yates et al → No 2 Mine; 1989-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mentor Mining Inc → No 2 Mine; 1989-05-01 to 1989-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Preece Kelly → Mentor Mining Inc; 1989-05-01 to 1989-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Potter Mining Company Inc → No 2 Mine; 1989-11-30 to 1990-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Derek  Potter et al → Potter Mining Company Inc; 1989-11-30 to 1990-08-07; source msha-controller-operator-history
- **controller_controls_operator:** David W  Potter et al → Potter Mining Company Inc; 1989-11-30 to 1990-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Sunnyside Mines Inc → No 2 Mine; 1990-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brent Coal Corp → No 2 Mine; 1990-08-08 to 1990-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Coleman George → No 2 Mine; 1990-08-08 to 1990-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Coleman George → Brent Coal Corp; 1990-08-08 to 1990-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Har-Lee Coal Company Inc → No 2 Mine; 1990-10-29 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Yates et al → Har-Lee Coal Company Inc; 1990-10-29 to 1990-12-27; source msha-controller-operator-history
- **operator_operates_mine:** R & S Coal Company Inc → No 2 Mine; 1990-12-28 to 1991-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Steven R  Mullins → No 2 Mine; 1990-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steven R  Mullins → R & S Coal Company Inc; 1990-12-28 to 1991-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Sunnyside Kentucky Inc → No 2 Mine; 1991-04-02 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Sunnyside Mines Inc → Sunnyside Kentucky Inc; 1991-04-02 to 1992-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Noah B  Lambert → No 2 Mine; 1991-12-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Elc Inc → No 2 Mine; 1992-06-01 to 1993-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Donn A  Chickering → No 2 Mine; 1992-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Elc Inc; 1992-06-01 to 1993-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Nbl Coal Company Inc → No 2 Mine; 1993-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Noah B  Lambert → Nbl Coal Company Inc; 1993-09-13 to current/open; source msha-controller-operator-history